Remote接口定义 //The code is used to create the remote interface of an enterprise bean //used by the HelloApp application import javax.ejb. ki import java rmi.* public interface Hello extends EJBObject String sayHello(string MyName) throws RemoteException; 构建一个名为 HelloApp的J2EE应用,上图给出了 该应用所使用的 remote接口的定义 该应用中的 Enterprise bean只有一个商业方法 sayhello Remote接口Helo的定义中包含了 say Hello方法的定义
Remote接口定义 ◼ 构建一个名为HelloApp的J2EE应用，上图给出了 该应用所使用的remote接口的定义 ◼ 该应用中的Enterprise bean只有一个商业方法—— sayHello ◼ Remote接口Hello的定义中包含了sayHello方法的定义 //The code is used to create the remote interface of an enterprise bean //used by the HelloApp application import javax.ejb.*; import java.rmi.*; public interface Hello extends EJBObject { String sayHello(String MyName) throws RemoteException; }
import //used by the HelloApp application ote interface of an enterprise bean /The code is used to create the re import javax. ejb mport java rmi. F public interface Hello extends EJBobject { String sayHello(string MyName) throws Remote Exception import语句用来包含预定义的类 s Java.rm包使用java前缀,因为rm包是标准的Java2 SDK包 javax ejb包不是标准的Java2SDK包,是Java扩展 ( extension)包,Java扩展包并不包含在Java核心库中
//The code is used to create the remote interface of an enterprise bean //used by the HelloApp application import javax.ejb.*; import java.rmi.*; public interface Hello extends EJBObject { String sayHello(String MyName) throws RemoteException; } import ◼ import语句用来包含预定义的类 ◼ java.rmi包使用java前缀，因为rmi包是标准的Java 2 SDK包 ◼ javax.ejb包不是标准的Java 2 SDK包，是Java扩展 （extension）包，Java扩展包并不包含在Java核心库中
接口定义 //used by the HelloApp applicatiop ote interface of an enterprise bean /The code is used to create the re import javax.ejb. i import java rmi. i public interface Hello extends eJBobject String sayhello(string MyName) throws RemoteException; 本例中定义了一个名为Helo的 remote接口,该接口被定义为 public 接口以允许其它构件访问
//The code is used to create the remote interface of an enterprise bean //used by the HelloApp application import javax.ejb.*; import java.rmi.*; public interface Hello extends EJBObject { String sayHello(String MyName) throws RemoteException; } 接口定义 ◼ 本例中定义了一个名为Hello的remote接口，该接口被定义为public 接口以允许其它构件访问
接口继承性 /The code is used to create the remote interface of an enterprise bean //used by the HelloApp application import javax.ejb. import java rmi K, public interface Hello extends EJBObject String sayHello(string MyName) throws Remote Exception He|l接口继承了 EJBObject接口 EJBObject接口包含在 javax. ejb包中,它又继承了 java rmi Remote接口
接口继承性 //The code is used to create the remote interface of an enterprise bean //used by the HelloApp application import javax.ejb.*; import java.rmi.*; public interface Hello extends EJBObject { String sayHello(String MyName) throws RemoteException; } ◼ Hello接口继承了EJBObject接口 ◼ EJBObject接口包含在javax.ejb包中，它又继承了 java.rmi.Remote接口
方法定义 //used by the HelloApp application ote interface of an enterprise bean /The code is used to create the re import javax.ejb. import java rmi K, public interface Hello extends EJBObject String sayHello(String MyName)throws RemoteExdeption; Remote接口用来定义 enterprise bean的商业方 n本例中仅包含一个商业方法的定义— say Hello
方法定义 //The code is used to create the remote interface of an enterprise bean //used by the HelloApp application import javax.ejb.*; import java.rmi.*; public interface Hello extends EJBObject { String sayHello(String MyName) throws RemoteException; } ◼ Remote接口用来定义enterprise bean的商业方 ◼ 本例中仅包含一个商业方法的定义——sayHello